Riley Exploration Permian (REPX) had the highest return between 1998 and 2002 by a US stock, returning 113,804.4%.

ASSET	YEARS	% RETURN
Riley Exploration Permian (REPX)	1998-2002	113,804.44%
Smith & Wesson Brands (SWBI)	1998-2002	3,703.9%
Xcel Brands (XELB)	1998-2002	3,400%
Versus Systems Inc. (VS)	1998-2002	1,900%
OPTIMIZERx (OPRX)	1998-2002	1,600%
Ainos (AIMD)	1998-2002	1,569.11%
NVR (NVR)	1998-2002	1,392.57%
Cognizant Technology Solutions Corp Class A (CTSH)	1998-2002	1,344.92%
Flexible Solutions International (FSI)	1998-2002	1,280.08%
Emerson Radio (MSN)	1998-2002	1,036.04%
Daktronics (DAKT)	1998-2002	919.35%
Clean Harbors (CLH)	1998-2002	822.02%
Perdoceo Education (PRDO)	1998-2002	776.71%
Forward Air (FWRD)	1998-2002	764.57%
Harmony Gold Mining (HMY)	1998-2002	744.3%
Lendway (LDWY)	1998-2002	737.59%
AYRO (AYRO)	1998-2002	725%
eBay (EBAY)	1998-2002	660.59%
SurModics (SRDX)	1998-2002	652.26%
Site Centers (SITC)	1998-2002	650.07%
Houston American Energy (HUSA)	1998-2002	620.04%
New England Realty Associates (NEN)	1998-2002	583.4%
Tandy Leather Factory (TLF)	1998-2002	576.01%
Quest Diagnostics (DGX)	1998-2002	574.36%
Gildan Activewear (GIL)	1998-2002	568.76%